. >> reporter: vice president joe biden accused the romney campaign of lying in a new ad in ohio that implies the auto bailout is sending american jobs overseas. >> why would they do this in the face of overwhelming facts contradicting them. >> reporter: republican vp candidate paul ryan said the ad was true. >> those facts are inconvenient for the president, but no one disputes them. >> reporter: ryan fought back hard. >> president obama took gm and chrysler into bankruptcy, taxpayers still stand to lose $25 billion from the president's politically managed bankruptcy. >> reporter: now romney has been on the defensive for months on his position on the auto bailout. he's now taking it right to the president and their skirmishes back and forth about the auto industry shows how important it is especially in ohio which could hold the key to the white house. there are 800,000 people in jobs related to the auto industry in that state and charlie and norah they could be decisive. >> jan crawford, thank you so much. national journal white house correspondent major garrett is here. let's talk